The Long Tentacle Anemone requires at least 10.2cm (4") of deep sand substrate in order to attach itself. Once attached, it rarely moves. In the wild, the Long Tentacle Anemone lives in shallow water, which is a good indicator of the high intensity light it requires. The tank needs to be large enough to allow the anemone to have open space around it to protect the other inhabitants from its powerful sting. Needs an SG of 1.023 – 1.025.

The base is usually orange to red but it has various colour patterns and forms. The oral disc is flared widely and with prominent white radial lines. The spaced tentacles are up to 15.2cm (6") long, corkscrew-like, and tipped with nematocyst, stinging cells. It can grow up to 50.8cm (20") in diameter. The mouth, which is located in the centre of the body, is also used to expel waste.